KR100230282B1 - Single program transport stream transmitting apparatus and the method therefor - Google Patents

Abstract

In order to control the recording / reproducing of the recording / reproducing apparatus for recording / reproducing the transport stream in the receiver receiving the transport stream, the receiver selects one program to form a transport stream of a single program and transmits it to the recording / reproducing apparatus. . At this time, by modifying and transmitting the PAT information in the transport stream for transmission of the program number, the recording / reproducing apparatus can recognize the program number in the single program transport stream to be recorded by itself so that the receiver does not have to transmit a separate program number. Enable remote control of the recording / playback apparatus. It is also possible to provide a consistent OSG by providing an OSG from the receiver to the recording / playback device.

Description

Single program transport stream transmission device and method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of digital audio / video (hereinafter referred to as A / V) devices, and more particularly to the field of multimedia systems in which digital A / V devices having digital interfaces are interconnected.

In the existing analog A / V device, there was no way to control another device from one device, but as most A / V devices gradually became digital, this was possible. For example, in the HD-DVCR conference (High Definition-Digital Video Cassette Recorder Conference), a command set called AV / C CTS (Audio / Video Control Command and Transaction Set) is defined to be controlled by a remote controller. Local devices), which allow operation commands to be sent over the IEEE 1394 serial bus. Here, the IEEE 1394 serial bus is a standard for high-speed data transmission defined by the IEEE, and is used as an interface for interconnecting devices of a digital multimedia system. The IEEE 1394 serial bus is an isochronous transfer mode and an isochronous transfer mode. It has an asynchronous transfer mode, A / V data is transmitted in real time using isochronous transfer mode, and transactions such as read / write / lock necessary for communication are transferred asynchronously using asynchronous transfer mode. do. Control commands such as AV / C CTS are transmitted asynchronously using this asynchronous transmission mode.

However, the contents defined in the AV / C CTS so far are mainly commanded by direct / indirect user input buttons, and the commandization of all operations is not yet completed and is being continually updated. In addition, there are insufficient commands related to the transmission of information on parts which are not yet visible or need not be shown to the user, so that free remote control between devices becomes difficult.

Meanwhile, "Specifications of Consumer-Use Digital VCRs using 6.3mm magnetic tapes-PART 8: ATV Specifications of Consumer-Use Digital VCR" and "Specifications of Digital Interface for Consumer Electronic Audio / Video Equipment-PART issued by HD-DVCR conference 1 PART 4 ", defines HDVCR using 6.3mm magnetic tape as a recording medium to record ATV broadcasts in the form of Moving Picture Experts Group 2-Transport Stream (MPEG2-TS) transmitted using IEEE 1394. have. In particular, in the above document, MPEG2-TS is a common format, as in the case of DVC (Digital Video Cassette, also known as a camcorder), that is, a common isochronous packet (CIP) header structure using the isochronous transmission mode of IEEE 1394. In this case, AV / C CTS is adopted as a control command. Here, MPEG2 is represented by three standards of MPEG2-system, MPEG2-video, and MPEG2-audio, and there are a transport stream TS and a program stream PS as transmission standards defined in the MPEG2-system.

A typical form of data transmission between ATVs and HDVCRs is shown in FIG. As defined in the following [1] blue book, A / V data transmitted during recording between the ATV 10 connected to the IEEE 1394 cable 30 and the HDVCR 20 is multi-program MPEG2-TS. The data transmitted from the HDVCR 20 to the ATV 10 during reproduction is a single program MPEG2-TS. Here, [1] the Blue Book is proposed in the HD-DVCR conference, "Specifications of Consumer-Use Digital VCRs using 6.3mm magnetic tapes," "Specifications of Digital Interface for Consumer Electronic Audio / Video Equipment," "Specifications of AV / C Command and Transaction Set for Digital Interface ". In addition, ATV (Advanced Television) is an American HDTV proposed by the Advanced Television Systems Committee (ATSC). In addition, AV / C Command and Transation Set (AV / C CTS), a control command proposed in [1] above, defines control commands for VCR sub-devices, and many of them are mechanical. Operation)

For example, commands such as fast-forward, rewind, and the like can be transmitted to the HDVCR 20 through the IEEE 1394 serial bus by the remote controller 11 of the ATV 10. However, the VCR sub-device control command does not include a command for transmitting information (for example, program number) related to the MPEG2 system layer.

Therefore, the transmission of MPEG2-TS between the ATV 10 and the HDVCR 20 transmits the MPEG2-TS from the ATV 10 to the HDVCR 20 during recording, but is transmitted from the ATV 10 in the HDVCR 20. The information (program number) necessary for parsing MPEG2-TS should be received from the user by using the HDVCR remote controller 21.

In addition, during playback, the recorded single program MPEG2-TS is transmitted from the HDVCR 20 to the ATV 10. At this time, the program number recorded in the video auxiliary (VAUX) area is also transmitted from the HDVCR 20 to the ATV (10). Should be sent). In addition, the above [1] Blue Book defines to record the program number along with the program in the VAUX area of the tape.

However, the multimedia system as shown in FIG. 1 requires the user to have an independent remote controller for each device connected to the ATV, that is, when a plurality of devices capable of recording / reproducing broadcast signals are connected to the ATV. There is a problem in that it is inconvenient because the operation command must be input by using a remote controller for a recording / playback apparatus.

Further, in order to select a program by analyzing program guide information (PG) in MPEG2-TS in the system shown in FIG. 1, the HDVCR 20 first receives program guide information in the multi-program MPEG2-TS transmitted from the ATV 10. It must be analyzed. In order to display the analyzed program guide information in OSG (On Screen Graphic), the transmission standard of OSG is not defined in IEEE 1394. Therefore, the OSG for this program guide information is encoded in MPEG2-TS and transmitted to the ATV 10. HDVCR The program number of the desired program is input while viewing the OSG displayed on the ATV 10 by the up / down keys of the remote controller 21 for control. Therefore, such a system requires the HDVCR 20 to separately encode an encoding circuit for encoding OSG into MPEG2-TS, and requires the ability to analyze information related to the program guide in MPEG2-TS for the composition of the OSG. In addition, since the generation of this OSG depends on the VCR manufacturer, there is a problem in that it cannot provide a consistent OSG. If the ATV 10 analyzes the program guide information in the MPEG2-TS transmitted and displays the analyzed program guide information using the built-in OSG function, even if the user inputs the program number by the remote controller 11 for the ATV. The program number could not be transmitted because no command for transmitting the program number to the HDVCR 20 was defined.

In order to overcome the above problems, an object of the present invention is to provide a transmission device that is integrated control by one remote controller by transmitting only the desired transport stream of a single program from the transport stream of the multi-program received by the receiver to the recording / playback device There is.

It is still another object of the present invention to analyze a program guide information in MPEG2-TS in a receiver receiving MPEG2-TS, display it in OSG, and transmit a single program transport stream corresponding to a program number to be inputted to a recording / reproducing apparatus. It is to provide a transmission device.

Another object of the present invention is to provide a method for transmitting only a desired transport stream of a single program from a transport stream of a multi-program received by a receiver to a recording / reproducing apparatus.

In order to achieve the above object, the present invention provides a multimedia system comprising at least a receiver for receiving a transport stream and a recording / reproducing apparatus for recording / reproducing the transport stream, wherein the receiver includes a desired program of the transport streams to be transmitted. A tuner for selecting a selected frequency band, a channel decoder for demodulating the transport stream output from the tuner, a remote controller for inputting a program number of a desired program, a PAT (Program Association Table) in the transport stream output from the channel decoder, A first signal processor that decodes the video and audio signals of the desired program based on the analyzed PAT and decodes the video and audio signals, respectively, the program number corresponding to the input program number of the analyzed PAT, and the corresponding program. Modified to include information A PAT modifier for outputting a PAT, a single transport stream extractor for extracting a transport stream corresponding to an input program number from a transport stream output from a channel decoder, and outputting the modified stream as a single program transport stream and a single program transport stream And a first digital interface for transmitting in isochronous packets. The recording / reproducing apparatus extracts a desired program from a second digital interface for depacketizing a single program transport stream transmitted as an isochronous packet through a first digital interface and a transport stream output from the second digital interface. And a second signal processor for recording and reproducing. The first signal processor may further include a program guide analyzer for analyzing program guide information in a transport stream output from the channel decoder, and an OSG generator for displaying the analyzed program guide information as an on screen graphic (OSG).

In order to achieve the above object, the present invention is directed to a method of transmitting a transport stream to a recording / reproducing apparatus having a digital interface and having a digital interface at a receiver receiving the transport stream and recording / reproducing the transport stream. Entering a program number. The present invention also provides a method of outputting a modified PAT by modifying a program association table (PAT) in a received transport stream to include a program number corresponding to an input program number and corresponding program information. Extracting the transport stream corresponding to the input program number from the transport stream and transmitting the extracted stream to the recording / reproducing apparatus together with the modified PAT as a single program transport stream.

1 is a diagram illustrating a conventional MPEG2-TS transmission method between an ATV and an HDVCR.

2 is a view for explaining the MPEG2-TS transmission method between the ATV and HDVCR proposed in the present invention.

3 is a block diagram according to an embodiment of a single program transport stream transmission apparatus according to the present invention.

FIG. 4A is a table of PAT syntax received by the tuner shown in FIG. 3, and FIG. 4B is a diagram illustrating the structure of the PAT shown in FIG. 4A.

FIG. 5A is a table of PAT syntax modified in the PAT modifier shown in FIG. 3, and FIG. 5B is a diagram illustrating the structure of the PAT shown in FIG. 5A.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

In the present invention, for convenience of explanation, ATV is taken as a representative example of the MPEG2-TS broadcast receiver, and HDVCR is taken as a representative example of the MPEG2-TS recording / reproducing apparatus. However, any device having a digital interface capable of receiving MPEG2-TS broadcast and capable of transmitting and receiving MPEG2-TS can replace the role of ATV described below. Similarly, devices capable of MPEG2-TS recording / playback can be It can replace the role of HDVCR.

In addition, in the multimedia system illustrated in FIG. 2, only the HDVCR 200 is connected to the ATV 100 by an IEEE 1394 cable 300 to simplify the circuit. However, other digital A / V devices may be connected to the ATV 100 and / or. The HDVCR 200 may be connected with an IEEE 1394 cable. In FIG. 2, the present invention uses one ATV remote controller 120, and when recording, a single MPEG2-TS is transmitted from the ATV 100 to the HDVCR 200, and at this time, the received multi-program MPEG2- The modified PAT for the single program MPEG2-TS by modifying the PAT information in the multi-program MPEG2-TS while transmitting a single program MPEG2-TS corresponding to the program number inputted by the remote controller 120 for the ATV from the TS. Information is also transmitted, and a single program MPEG2-TS is transmitted from the HDVCR 200 to the ATV 100 during reproduction.

A block diagram of an apparatus that implements the transmission of a single program transport stream between ATV 100 and HDVCR 200 is shown in FIG. 3. In FIG. 3, the tuner 101 selects a frequency band including a desired program in a multi-program MPEG2-TS transmitted through an antenna. The channel decoder 102 demodulates the transmitted signal and removes the error correction code to extract the multi-program MPEG2-TS of the desired channel from the MPEG2-TS. This MPEG2-TS corresponds to the MPEG2 system layer.

Here, the MPEG2 system layer will be briefly described to help understand the present invention. One program is composed of video information, audio information and user data information. MPEG2-TS defined in the MPEG2 system layer is time-division multiplexed with video, audio, and user data information corresponding to multiple programs in one stream. This MPEG2-TS includes program specific information (hereinafter referred to as PSI) so that the receiver can properly analyze audio, video, and user data information corresponding to a desired program when demultiplexing at the receiving end.

Most PSIs have a table format, and typical tables include a program association table (PAT), a program map table (PMT), and a conditional access table (CAT). The most important tables are PAT and PMT. One PMT exists per program, and the serial number (hereinafter referred to as PID (Packet Identification)) for transport stream packets containing the video and audio streams of the program is itemized. Here is a table. That is, the video stream of the program is represented by PID = XXXX, and the audio stream is represented by PID = YYYY. The packets of the transport stream are fixed lengths of 188 bytes in length.

Since a plurality of programs generally exist in one transport stream TS, there are a plurality of PMTs in the transport stream. Therefore, there is a need for a comprehensive table linking the multiple programs being transmitted in the transport stream with the PID for the PMT for each program, which is the PAT. Since one program is represented by one program number, most items of the PAT are composed of information representing the relationship between program number = XXXX and PMT PID.

On the other hand, the PAT analyzer 104 finds the PAT packet in the multi-program MPEG2-TS which is the output of the channel decoder 102 through the switching controller 103, analyzes the PAT, and the user outputted through the ATV microcomputer 109 The PMT PID of the program corresponding to the selected program number is output. Since the PID of the PAT is promised to be "0", the PAT is extracted by checking whether the PID of the PAT is "0". In addition, the PAT analyzer 104 is a multi-program MPEG2-TS output from the channel decoder 102 or a single program MPEG2- transmitted from the HDVCR 200 via the add header inserter / remover 114 based on the analyzed PAT. It is checked whether it is TS and output to the ATV microcomputer 109.

Here, the PAT syntax of the received multi-program MPEG2-TS is as shown in FIG. 4A, and the table is as shown in FIG. 4B. As can be seen from Figs. 4A and 4B, in the PAT in MPEG2-TS, the packet ID of the PMT containing the program information of the program corresponding to the program number is listed for each program number.

The PMT analyzer 105 receives the PID of the PMT from the PAT analyzer 104, finds PMT packets, analyzes the PMT, and extracts the video PID and audio PID in the analyzed PMT. The video decoder 106 separates the video stream from the multi-program MPEG2-TS output from the channel decoder 102 according to the extracted video PID, decodes the separated video stream, and displays the decoded video signal (not shown). Display). The audio decoder 107 decodes the audio stream from the multi-program MPEG2-TS output from the channel decoder 102 according to the extracted audio PID and outputs the decoded voice signal through a voice output device (not shown) such as a speaker. do.

The PG analyzer 108 analyzes program guide information in the multi-program MPEG2-TS output from the channel decoder 102 and outputs it to the ATV microcomputer 109.

Under the control of the ATV microcomputer 109, the OSG generator 111 mixes the program guide information with the graphic signal used as the OSG wallpaper generated by the graphic source 110 to display on the display or to display the program guide information through the video decoder ( In step 106, the decoded video signal is mixed and displayed on a display. In this case, the user inputs a program number of a desired program through the remote controller 120. In this case, since the OSG is reproduced by the ATV 100, the OSG of the same type is provided regardless of the manufacturer of the connected device. Therefore, there is an advantage that can provide a consistent OSG to the user. In addition, the HDVCR signal processor 205 of the HDVCR 200 does not need to analyze program guide information in MPEG2-TS.

Here, instead of the OSG generator 111, it may be configured as an OSD generator for generating program guide information to the OSD (On Screen Display). In addition, the PAT analyzer 104 to the OSG generator 111 may be referred to as an ATV signal processor.

On the other hand, a program number is required to extract a single program from multiple programs MPEG2-TS received at the time of recording. The program number is a value determined by the user's choice. The program number needs to be known to analyze PAT and PMT information transmitted to MPEG2-TS. Even if the MPEG2-TS transmitted is a single program MPEG2-TS, the program number is necessary. This is because the MPEG2-TS syntax defined in the MPEG2 system layer has a common and consistent format for both a single program MPEG2-TS and a multi-program MPEG2-TS.

Conventionally, in the case of multi-program MPEG2-TS transmission during recording, it is not possible to extract a single program from the HDVCR 200 without transmitting a program number. However, the ATV 100 extracts one program by using the program number input from the user through its remote controller 120, and in the form of a single program MPEG2-TS with a modified PAT for the single program MPEG2-TS. When transmitting to the HDVCR 200, the program number can be recognized without receiving a program number from the HDVCR 200 separately. That is, when the single program PMEG2-TS is transmitted from the ATV 100 to the HDVCR 200, the HDVCR 200 automatically recognizes the program number because there is only one item in the currently transmitted single program. Therefore, in the ATV 100 receiving the program number through the ATV remote controller 120, the HDVCR 200 knows the PID of the PMT through the modified PAT without transmitting only a separate program number, and desired by the PMT. You can select audio and video packets. This fact also applies to playback.

Accordingly, the PAT modifier 112 shown in FIG. 3 modifies the PAT for single program MPEG2-TS transmission as shown in FIG. 5A based on the PAT analyzed by the PAT analyzer 104. FIG. 5B is a diagram illustrating a structure of a PAT according to the syntax of the PAT illustrated in FIG. 5A. Comparing the modified PAT structure shown in FIG. 5B with the PAT structure received by the tuner 101 shown in FIG. 4B, the single program number, the PID of the corresponding PMT, and optionally the program number “0” for the network PID Only the network PID is included, and the shaded area, ie section length and error correction code (denoted CRC32), is different.

The single transport stream extractor 113 extracts a single program MPEG2-TS corresponding to a program number input from the multi-program MPEG2-TS output from the channel decoder 102 and adds the same together with the PAT modified by the PAT modifier 112. Output to header inserter / remover 114.

Here, the switching controller 103 outputs the output of the channel decoder 102 to the PMT analyzer 104 and the PG analyzer 108 in the display mode according to the mode switching control signal output from the ATV microcomputer 109, and records it. In the mode, the single program MPEG2-TS output from the single transport stream extractor 113 is outputted to the additional header inserter / remover 114. In the playback mode, the HDVCR 200 is outputted through the additional header inserter / remover 114. The transmitted single program MPEG2-TS is output to the PMT analyzer 104 and the PG analyzer 108.

Meanwhile, the transaction layer IEEE 1394 serial bus operating layer, link layer 115, and physical layer 116 may be referred to as an IEEE 1394 protocol and may be referred to as a digital interface for ATV, and the transaction layer IEEE 1394 serial bus operating layer may be an ATV microcomputer ( 109) is embedded in the software. And, the detailed structure and operation description of the IEEE 1394 interface is described in the document [2] P1394, Draft 8.Ov4, "High Performance Serial Bus" published in November 21, 1995.

The HDVCR 200 comprises a digital interface consisting of a physical layer 201, a connection layer 202, a transaction layer IEEE 1394 serial bus operating layer, an HDVCR microcomputer 203, an additional header inserter / remover 204, and an HDVCR signal. It is a processor 205. Here, the transaction layer IEEE 1394 serial bus operating layer is embedded in the HDVCR microcomputer 203 in software.

Next, transmission of a single program MPEG2-TS in isochronous transmission mode through the IEEE 1394 serial bus will be described.

(I) Gyoxy

The additional header inserter / remover 114 is time stamped to transmit 188 bytes of single program MPEG2-TS packets including the modified PAT output from the single transport stream extractor 113 via the IEEE 1394 interface. Is inserted into blocks of predetermined bytes (24 bytes) to form an IEEE 1394 transmission data block packet having a CIP header inserted therein. The link layer 115 converts the IEEE 1394 transmission data block packet in which the CIP header outputted from the additional header inserter / remover 114 is inserted into an isochronous packet, and converts the packet into an isochronous packet and converts it into a serial signal. The physical layer 116 converts an isochronous packet converted into a serial signal into an electrical signal.

The isochronous packet converted into an electrical signal is input to the physical layer 201 of the digital interface for HDVCR through the IEEE 1394 cable 300 and converted into digital data, and the link layer 202 is an isochronous packet converted into digital data. Is converted to byte-wise parallel data and then the isochronous header is removed. The additional header inserter / remover 204 removes the additional header (CIP header) again, packetizes the transport header (TS), and outputs the packet to the HDVCR signal processor 205. The HDVCR signal processor 205 analyzes the modified PAT from the transport packetized single-program MPEG2-TS and analyzes the PID of the PMT in the analyzed PAT. Then, the audio PID and the video PID are extracted from the PID of the PMT, all packets of the desired program are extracted, decoded into a video signal and an audio signal, and recorded on a tape.

(II) During playback

The HDVCR signal processor 205 packetizes the video and audio signals reproduced from the tape into the transport stream. The additional header inserter / remover 204 inserts a time stamp so that the HDVCR signal processor 205 can transmit the packetized transport stream through the IEEE 1394 interface, and in units of blocks of a predetermined byte (24 bytes). By dividing, a data block packet for IEEE 1394 transmission in which a CIP header is inserted is constructed. The link layer 202 adds an isochronous header, packetizes the IEEE 1394 transmission data block packet with the CIP header outputted from the additional header inserter / remover 204, and converts the packet into an isochronous packet and converts it into a serial signal. The physical layer 201 converts an isochronous packet converted into a serial signal into an electrical signal.

The isochronous packet converted into an electrical signal is input to the physical layer 116 of the digital interface for ATV through the IEEE 1394 cable 300 and converted into digital data, and the link layer 115 is isochronous packet converted into digital data. Is converted to byte-wise parallel data and then the isochronous header is removed. The additional header inserter / remover 114 removes the additional header (CIP header) again, packetizes the transport stream, and outputs the packet to the PAT analyzer 104. The reproduced MPEG2-TS receives the PID of the PMT of the PAT analyzed by the PAT analyzer 104 in the PMT analyzer 105 and extracts an audio PID and a video PID from the PID of the PMT. The video decoder 106 and the audio decoder 107 decode the video signal and the audio signal according to the video PID and the audio PID, display them on a display or output them through a speaker.

The present invention can be applied to all recording / reproducing apparatus using MPEG2-TS as a transmission format and using the MPEG2-TS demultiplexer / decoder. For example, it can be applied to DVC and MPEG2-TS recording-compatible D-VHS using an MPEG2 encoder / decoder.

As described above, the present invention integrates various digital A / V devices in one device by transmitting a single program transport stream corresponding to a program number selected by a user in the ATV to the HDVCR by modifying the PAT without transmitting a separate program number. To control. In addition, the present invention has the effect of providing a consistent OSG by providing an OSG in the ATV.

Claims (16)

A multimedia system comprising at least a receiver receiving a transport stream and a recording / reproducing device for recording / reproducing the transport stream: The receiver, A tuner for selecting a frequency band including a desired program from a transport stream transmitted; A channel decoder for demodulating the transport stream output from the tuner; A remote controller for inputting a program number of a desired program; A first signal processor that analyzes a PAT (Program Association Table) in a transport stream output from the channel decoder, and decodes a video signal and an audio signal by separating a video stream and an audio stream of a desired program based on the analyzed PAT ; A PAT modifier for modifying the analyzed PAT to include a program number corresponding to the input program number and program information corresponding to the input PAT, and output a modified PAT; A single transport stream extractor for extracting a transport stream corresponding to the input program number from the transport stream output from the channel decoder and outputting the transport stream as a single program transport stream together with the modified PAT; And A first digital interface for transmitting said single program transport stream in an isochronous packet, The recording / reproducing apparatus, A second digital interface for depacketizing a single program transport stream transmitted in an isochronous packet via the first digital interface; And And a second signal processor for extracting a desired program from the transport stream output from the second digital interface, recording the recorded program on the recording medium, and playing the recording medium. 2. The apparatus of claim 1, wherein the receiver is connected to at least one recording / reproducing device and controls the recording / reproducing devices collectively by a remote control of the receiver. 2. The apparatus of claim 1, wherein the first and second digital interfaces are IEEE 1394 interfaces. The single program transport stream according to claim 1, wherein the receiver outputs a transport stream output from the channel decoder to the first signal processor in a display mode according to a mode switching signal, and outputs from the single transport stream extractor in a recording mode. Outputs the signal to the first digital interface, and switches to output the single program transport stream reproduced by the recording / reproducing apparatus to the first signal processor through the first digital interface in the reproduction mode. A single program transport stream transport device. The method of claim 1, wherein the first signal processor A program guide analyzer for analyzing program guide information in a transport stream output from the channel decoder; And And an OSG generator for displaying the analyzed program guide information as an On Screen Graphic (OSG). The apparatus of claim 5, wherein the OSG generator generates the OSG by mixing the program guide information with a graphic signal of an embedded background screen. The apparatus of claim 5, wherein the OSG generator generates the OSG by mixing the program guide information with the decoded video signal. The method of claim 1, wherein the first signal processor A program guide analyzer for analyzing program guide information in a transport stream output from the channel decoder; And And an on-screen display (OSD) generator for displaying the analyzed program guide information on an on screen display (OSD). The apparatus of claim 5, wherein the second signal processor does not analyze program guide information in a transport stream output from the second digital interface by itself. 4. The IEEE 1394 transmission data of claim 3, wherein the receiver inserts an additional header into a single transport stream output from the single transport stream extractor to configure an IEEE 1394 transport data block packet, and reproduced IEEE 1394 transport data output from the first digital interface. And an additional header inserter / remover for removing the additional header inserted in the block packet. The apparatus of claim 3, wherein the recording / reproducing apparatus removes an additional header inserted in an IEEE 1394 transmission data block packet transmitted through the second digital interface, and adds the additional header to a transport stream reproduced by the second signal processor. And an additional header inserter / inserter for inserting an additional header constituting the IEEE 1394 transport data block packet by inserting a. A method for transmitting a transport stream to a recording / reproducing device having a digital interface and having a digital interface and recording / reproducing the transport stream, the method comprising: (a) inputting a program number to be recorded; (b) modifying a program association table (PAT) in the received transport stream to include a program number corresponding to the program number input in the step (a) and program information corresponding thereto and outputting the modified PAT; And (c) extracting a transport stream corresponding to the program number input in step (a) from the received transport stream and transmitting the extracted stream to the recording / reproducing apparatus together with the modified PAT as a single program transport stream. A single program transport stream transmission method. The method of claim 12, wherein step (a) (a1) analyzing program guide information in the transport stream; (a2) displaying the analyzed program guide information; And and (a3) inputting a desired program number based on the displayed program guide information. The method of claim 13, wherein in the step (a2), the analyzed program guide information is displayed as an OSG. The method of claim 13, wherein in the step (a2), the analyzed program guide information is displayed in an OSD. The method of claim 12, (d) inputting a program number to be played back; And and (e) transmitting a single program transport stream reproduced by the recording / reproducing apparatus corresponding to the program number input in step (d) to the receiver.

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